Roxar introduces third-generation multiphase meter

Roxar has launched its third-generation multiphase meter - the Roxar Multiphase meter 2600 – based on Zector Technology.

Offshore staff

STAVAGNER -- Roxar has launched its third-generation multiphase meter - the Roxar Multiphase meter 2600 – based on Zector Technology.

The meter's Zector Technology consists of new field electronics, new electrode arrangements, and voxel-based signal processing. It allows for a large number of simultaneous sectors of the flow to be investigated with a measurement rate of 12,000 measurements per second.

The technology allows for an accurate understanding of flow regimes, mixing effects, and velocity profiles and can detect rapid changes in composition, according to Roxar. It also measures multiple oil and gas flow velocities as a function of its 4D location.

The MPFM 2600 comes in a new and light-weight design which, at 110 kg (220 lb) and 650 mm (25.5 in.), is 80% lighter and 50% shorter than previous Roxar multiphase meters. This allows operators to install the MPFM 2600 on individual wells and in previously inaccessible locations, the company says. The standard version of the MPFM 2600 is without radioactive technology and covers the full operating range 0 -100% watercut and 0 - 100% GVF. For special applications or GVF (Gas Void Fractions) above 95% it is recommended to add a compact gamma density system to the meter.

According to Roxar, the most important new feature of the MPFM 2600 is the Zector technology, which has three main elements: the Voxel-based signal processing, the DP26 electrode geometry, and new impedance electronics.

•The Voxel-based signal processing defines the flow into separate volumes - voxels or volumetric pixels. The system, which operates alongside the electrode geometry and field electronics, is in 4D

•The new compact DP26 Electrode Geometry Sensor allows for measurements in separate sectors in addition to the full cross sectional area. This results in more combinations and more accurate fraction measurements and velocities for each segment

•The new field electronics system allows for capacitance and conductance measurements to be combined. Rather than switching between oil and water continuous mode in a matter of seconds, operators can now switch modes in milliseconds. Furthermore, whereas contact electrodes have traditionally suffered from variable surface resistance, this is overcome by the MPFM 2600 using four of the six electrodes in the six-electrode geometry for conductivity measurement

•A field replaceable insert Venturi also allows for extended service life and operating range, and removes uncertainties in sizing meters based on uncertain production forecasts. A compact isolation valve and a multi transmitter for pressure, temperature, and differential pressure, enables accurate differential pressure measurements.

The MPFM 2600 also includes an Analog Devices Blackfin Processor with low energy requirements. This enables fast and extensive signal processing at the front-end electronics, the company says.

02/11/2009

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